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5. Alice wishes to send the message m4 to Bob using RSA encryption. She looks up Bob's public key...
This question tests your knowledge of encryption and decryption using the RSA method. the numbers in...
This question tests your knowledge of encryption and decryption using the RSA method. the numbers in soled are deliberately chosen to be mall enough to focus on gown understanding without excessive calculations. Alice and Bob decide to use an RSA cryptosystem with public key (77, 13) for communication. Alice wants to send Bob the message m = 22. Determine Alice's ciphertext c. Determine Bob's private boy Carry out Bob's decryption of Aloe's ciphertext c, and compare his result with Alice's...
Q3: Suppose Bob wants to send an encrypted message to Alice. Which one of the followings...
Q3: Suppose Bob wants to send an encrypted message to Alice. Which one of the followings is correct? 1. Bob uses a shared secret key to encrypt the message. Alice uses Bob's public key to decrypt the encrypted message. 2. Bob uses Alice's private key to encrypt the message. Alice uses a shared secret key to decrypt the encrypted message. 3. Bob uses Alice's public key to encrypt the message digest. Alice uses Bob's public key to decrypt the encrypted...
5. Consider the RSA encryption scheme, Alice wants to send a message to Bob. Both Alice...
5. Consider the RSA encryption scheme, Alice wants to send a message to Bob. Both Alice and Bob have p= 17,9 = 19. Alice has e=31 and Bob has e=29. a. What is the public key pair used in the transmission? 2 marks b. What is the secret key pair used in the transmission? 4 marks c. Encrypt the message m=111. 4 marks d. Decrypt the resulting ciphertext. 4 marks e. What's the security problem between Alice and Bob? How...
Using RSA Implementation: 1. Alice's RSA public key is given by (e, n) = (59, 1189)....
Using RSA Implementation:
1. Alice's RSA public key is given by (e, n) = (59, 1189). = (a) Determine Alice's private key (d, n). (b) Bob sends his first message Mi 67 to Alice, encrypting it with RSA using Alice's public key. He obtains a cypher text Cị that gets forwarded to Alice. What is Cį? (c) Bob sends his second message M2 to Alice, encrypting it with RSA using Alice's public key. Eve, who was eavesdropping on the commu-...
Question 11 (1 point) Approximately how many different starting settings could be created from the Enigma...
Question 11 (1 point) Approximately how many different starting settings could be created from the Enigma machine's remarkably simple architecture. Question 11 options: 160 X 10 ^9 160 X 10^36 160 X 10^72 160 X 10^18 Question 12 (1 point) PGP uses a two-phase encryption approach to encrypt a message, and a second two-phase approach to decrypt a message. Alice wishes to send a message to Bob that will be confidential and also prove to Bob that Alice was the...
Bob wants to send an encrypted message using public key cryptography to Alice. What key does...
Bob wants to send an encrypted message using public key cryptography to Alice. What key does he use for encryption? You need to be explicit whose key it is and what kind of key it is. 1 AB I
(8) In an RSA cryptosystem, Bob’s public key is (n = 629, e = 43). Alice...
(8) In an RSA cryptosystem, Bob’s public key is (n = 629, e = 43). Alice uses this public key to encrypt the word “MARCH” and send the ciphertext to Bob. First, she represents this word in ASCII where the capital letters A, B, C, . . . , X, Y, Z are represented by integers 65, 66, 67, . . . , 88, 89, 90 respectively. Then she encrypts the five integers that represent M, A, R, C, H...
Alice wants to send a message m to Bob using Rabin Cryptosystem. Bob makes the public...
Alice wants to send a message m to Bob using Rabin Cryptosystem. Bob makes the public key n = 77 and sends it to Alice. By using Rabin Cryptosystem, a) Alice encrypts her message m and sends the encrypted message c to Bob. What are the encrypted messages if m = 8, 36, 41 and 69? b) Alice encrypts her message m = 6 and sends the encrypted message c to Bob. Bob decrypts the message. What are the possible...
Exercise 1 (2 pts). In an RSA cryptosystem, Bob's public key is (n = 253, e...
Exercise 1 (2 pts). In an RSA cryptosystem, Bob's public key is (n = 253, e = 3), Alice uses this public key to encrypt a message M for Bob. The resulting ciphertext is 110. Recover the message M. (You can use online modular calculators available at the Web.)
O-8. (15 points) Bob's simple toy RSA eryptosystem has public key kyub(n, e) (65,5), where n =p,-...
o-8. (15 points) Bob's simple toy RSA eryptosystem has public key kyub(n, e) (65,5), where n =p,-5x13-65 and e-5. I. Describe the key pair generation procedure for Bob to generate his private key kor- d. With the above given parameters, use EEA to calculate d 2. Describe RSA encryption procedure that Alice uses to encrypt her plaintext message x to its above given parameters, what will be y? ciphertext y before sending the message to Bob. Suppose Alice's message x-...
This question tests your knowledge of encryption and decryption using the RSA method. the numbers in soled are deliberately chosen to be mall enough to focus on gown understanding without excessive calculations. Alice and Bob decide to use an RSA cryptosystem with public key (77, 13) for communication. Alice wants to send Bob the message m = 22. Determine Alice's ciphertext c. Determine Bob's private boy Carry out Bob's decryption of Aloe's ciphertext c, and compare his result with Alice's...
Q3: Suppose Bob wants to send an encrypted message to Alice. Which one of the followings is correct? 1. Bob uses a shared secret key to encrypt the message. Alice uses Bob's public key to decrypt the encrypted message. 2. Bob uses Alice's private key to encrypt the message. Alice uses a shared secret key to decrypt the encrypted message. 3. Bob uses Alice's public key to encrypt the message digest. Alice uses Bob's public key to decrypt the encrypted...
5. Consider the RSA encryption scheme, Alice wants to send a message to Bob. Both Alice and Bob have p= 17,9 = 19. Alice has e=31 and Bob has e=29. a. What is the public key pair used in the transmission? 2 marks b. What is the secret key pair used in the transmission? 4 marks c. Encrypt the message m=111. 4 marks d. Decrypt the resulting ciphertext. 4 marks e. What's the security problem between Alice and Bob? How...
Using RSA Implementation:
1. Alice's RSA public key is given by (e, n) = (59, 1189). = (a) Determine Alice's private key (d, n). (b) Bob sends his first message Mi 67 to Alice, encrypting it with RSA using Alice's public key. He obtains a cypher text Cị that gets forwarded to Alice. What is Cį? (c) Bob sends his second message M2 to Alice, encrypting it with RSA using Alice's public key. Eve, who was eavesdropping on the commu-...
Bob wants to send an encrypted message using public key cryptography to Alice. What key does he use for encryption? You need to be explicit whose key it is and what kind of key it is. 1 AB I
Exercise 1 (2 pts). In an RSA cryptosystem, Bob's public key is (n = 253, e = 3), Alice uses this public key to encrypt a message M for Bob. The resulting ciphertext is 110. Recover the message M. (You can use online modular calculators available at the Web.)
o-8. (15 points) Bob's simple toy RSA eryptosystem has public key kyub(n, e) (65,5), where n =p,-5x13-65 and e-5. I. Describe the key pair generation procedure for Bob to generate his private key kor- d. With the above given parameters, use EEA to calculate d 2. Describe RSA encryption procedure that Alice uses to encrypt her plaintext message x to its above given parameters, what will be y? ciphertext y before sending the message to Bob. Suppose Alice's message x-...
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